public static List <string> GetResolveableNamespaces(RefactoringOptions options, out bool resolveDirect) { IReturnType returnType = null; INRefactoryASTProvider astProvider = RefactoringService.GetASTProvider(DesktopService.GetMimeTypeForUri(options.Document.FileName)); if (options.ResolveResult != null && options.ResolveResult.ResolvedExpression != null) { if (astProvider != null) { returnType = astProvider.ParseTypeReference(options.ResolveResult.ResolvedExpression.Expression).ConvertToReturnType(); } if (returnType == null) { returnType = DomReturnType.GetSharedReturnType(options.ResolveResult.ResolvedExpression.Expression); } } List <string> namespaces; if (options.ResolveResult is UnresolvedMemberResolveResult) { namespaces = new List <string> (); UnresolvedMemberResolveResult unresolvedMemberResolveResult = options.ResolveResult as UnresolvedMemberResolveResult; IType type = unresolvedMemberResolveResult.TargetResolveResult != null?options.Dom.GetType(unresolvedMemberResolveResult.TargetResolveResult.ResolvedType) : null; if (type != null) { List <IType> allExtTypes = DomType.GetAccessibleExtensionTypes(options.Dom, null); foreach (ExtensionMethod method in type.GetExtensionMethods(allExtTypes, unresolvedMemberResolveResult.MemberName)) { string ns = method.OriginalMethod.DeclaringType.Namespace; if (!namespaces.Contains(ns) && !options.Document.CompilationUnit.Usings.Any(u => u.Namespaces.Contains(ns))) { namespaces.Add(ns); } } } resolveDirect = false; } else { namespaces = new List <string> (options.Dom.ResolvePossibleNamespaces(returnType)); resolveDirect = true; } for (int i = 0; i < namespaces.Count; i++) { for (int j = i + 1; j < namespaces.Count; j++) { if (namespaces[j] == namespaces[i]) { namespaces.RemoveAt(j); j--; } } } return(namespaces); }